As far as aggression goes...in a pond/aquarium, the larger the male tilapia gets, the larger the nesting area it defends. When hauling, aggression is not an issue as the fish are held in darkness and they are so densely stocked, they do no fighting at all...the strssors are the constant motion, tight, confining, darkness with water qualities that can become horrible rapidly....but those are a live-haulers issues to deal with and still stock fish that will have a very low mortality rate. The rest of the reasons small, freshly stocked fish become sushi applies to any fish and is spot on....
